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Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February from the 06th to the 07th, 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 59 Sieve Analysis

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 169 Tap Density of Water Disperse Granules

GLP compliance:

yes (incl. QA statement)

Type of method:

sieving

Type of particle tested:

primary particle

Type of distribution:

mass based distribution

Specific details on test material used for the study:

Test Item was used in its initial form.

Mass median aerodynamic diameter:

100 - 250 µm

Size:

< 45 µm

Distribution:

0.9 %

Remarks on result:

other: based on sum of residues

Size:

< 100 µm

Distribution:

35.5 %

Remarks on result:

other: based on sum of residues

Size:

< 250 µm

Distribution:

60.6 %

Remarks on result:

other: based on sum of residues

TAP DENSITY DETERMINATION

The tap density of the test item was found to be 0.80 g/ml.

Sample mass (W): 80.3 g

Sample volume after dropping (V): 100 ml

Tap density (D): 0.80 g/ml

SIEVE TEST

The particle size distribution of test item was found to be within 45 µm, 1000 µm.

Number of sieves (n): 8

Sample mass (calculated): 128.5 g

Samples mass (m): 128.62 g

Sieve		Residue mass gx (g)	Residue rx %	Sum of residues Rx %
Size (μm)	Serial No.
< 45	-	3.07	2.4	99.1
45	20111588	12.47	9.7	96.7
63	20111627	28.97	22.5	87.0
100	31121141	32.28	25.1	64.5
250	20111667	33.63	26.1	39.4
500	16111554	16.11	12.5	13.2
1000	20111725	0.87	0.7	0.7
2000	24111027	0.01	0.0	0.0
4000	14111099	0.00	0.0	0.0

g_x:the amount of material retained by the sieve x

r_x: ratio * 100 of the amount of material retained by the sieve x and sample mass

R_x: the calculated sum of residues on all the x sieves. Therefore the residue Rx on sieve x and the residues on all coarser sieves were summed.

Conclusions:

D50: 100 - 250 µm

Executive summary:

Machine sieving test was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 100, 63 and 45 µm. The analysis has been performed according to the testing procedures described in the following guidelines: CIPAC MT 59 Sieve Analysis, CIPAC MT 170 Dry Anlysis of Water Dispersable Granules and CIPAC MT 169 Tap of Water Dispersable Granules. The particle size distribution of test item was found to be within 45 µm, 1000 µm.

Conclusion

D50: 100 - 250 µm

Description of key information

D50: 100 - 250 µm

Additional information

Sieving test - CIPAC MT 59, 170 and 169